CN111112564A - Flexible forming device and method for producing seamless fiber reinforced metal-based composite pipe - Google Patents
Flexible forming device and method for producing seamless fiber reinforced metal-based composite pipe Download PDFInfo
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- CN111112564A CN111112564A CN201911175294.0A CN201911175294A CN111112564A CN 111112564 A CN111112564 A CN 111112564A CN 201911175294 A CN201911175294 A CN 201911175294A CN 111112564 A CN111112564 A CN 111112564A
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- 239000002131 composite material Substances 0.000 title abstract description 12
- 238000005096 rolling process Methods 0.000 claims abstract description 57
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- 238000005266 casting Methods 0.000 claims abstract description 22
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/003—Aluminium alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/004—Copper alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/006—Continuous casting of metals, i.e. casting in indefinite lengths of tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/168—Controlling or regulating processes or operations for adjusting the mould size or mould taper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/08—Making alloys containing metallic or non-metallic fibres or filaments by contacting the fibres or filaments with molten metal, e.g. by infiltrating the fibres or filaments placed in a mould
- C22C47/12—Infiltration or casting under mechanical pressure
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
- C22C49/04—Light metals
- C22C49/06—Aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Continuous Casting (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
The invention provides a flexible forming device for producing a seamless fiber reinforced metal-based composite pipe. The invention also comprises a flexible forming method for producing the seamless fiber reinforced metal matrix composite pipe, which comprises the following steps: and (3) mounting the reinforced fiber coil on a roller, enabling one end of the reinforced fiber to pass through an arc-shaped guide plate along a conveying roller, pass through a tundish, pass through a flow distributor below, extend to a metal casting and rolling area, and forming a fiber reinforced composite pipe along with the rolling of a casting and rolling machine. The invention gives play to the characteristic that the casting and rolling machine can produce pipes with different apertures and wall thicknesses, has the advantages of convenient replacement of the size, the type and the quantity of the reinforcing fibers, simplifies the production process, improves the production efficiency and the metal utilization rate, and increases the diversity of products.
Description
Technical Field
The invention relates to the field of composite material processing, in particular to a flexible forming device and a flexible forming method for producing a seamless fiber reinforced metal-based composite pipe.
Background
The composite material is a new material formed by optimizing and combining two or more materials with different properties. The fiber reinforcement is a novel material with high strength performance formed by adding a reinforcing material into a certain material which is used as a base material.
At present, a reinforced pipe is commonly available in the market, the performance of the pipe is enhanced by adding other medium materials into the pipe wall of a raw material rubber and PVC pipeline, and the reinforced pipe is made of other net materials and also made of spiral metal wires. The pipe reinforced by the spiral metal wires not only keeps lighter weight, but also absorbs the advantage of high metal strength, and has better performance. There is also a fiber-reinforced metal sheet, in which a web-shaped reinforcing fiber is fed during rolling of the metal sheet and rolled to produce a fiber-reinforced metal sheet, which can produce various web-shaped fiber-reinforced metal sheets. If the metal plate produced by the method is used for producing the pipe, the pipe can only be produced by adopting a welding method, and the seamless fiber reinforced pipe cannot be produced. Compared with the fiber reinforced PVC pipe, the seamless fiber reinforced metal-based composite pipe has the advantages that metal has natural high strength, heat conduction, magnetic conduction, electric conduction and the like compared with PVC plastic, and compared with the pipe formed by welding plates, the seamless fiber reinforced metal-based composite pipe has the advantages that the pressure resistance is strong, materials are saved, the working procedures are few and the like, which cannot be surpassed. The seamless fiber reinforced metal-based composite pipe overcomes the performance defects of the common seamless metal pipe and has the advantages of high specific rigidity, high specific strength, good stability and the like.
There are two general methods for producing seamless fiber reinforced metal matrix composite tubes: the first method is to spirally wind a layer of reinforced fiber material on a cylinder, spray a molten metal base on the surface of the cylinder, and finally carry out hot extrusion to produce a finished product; the second method is to arrange the reinforcing fiber into a certain shape, then pour molten metal into a die, and then carry out hot extrusion to produce a finished product. The two production methods are relatively complicated in process and unstable in product quality, and a production method capable of flexibly producing various fiber reinforced seamless steel pipes with various specifications is urgently needed to make up for the defects of the existing production method.
The invention closest to the invention is a seamless metal tube flexible forming device, and the patent numbers thereof are as follows: CN 201810311130.5. The working principle of the rolling mill is briefly introduced, the rolling mill consists of a hyperbolic rolling mill and a core rolling mill, because of the angular difference between the two rolling mills, an axial force is generated to the front in the rolling process to drive the rolled metal plate to move forwards, and simultaneously because of the existence of the hyperbolic rolling mill and a lower pipe former, the rolled metal plate is bent around the core rolling mill, so that the two movements are combined into spiral forward movement. During the forward spiral movement of the metal sheet, the first rolled metal sheet is wound around the initial casting area, heated and metallurgically remelted to form a seamless metal tube. The casting and rolling machine frame is provided with an adjusting device which can adjust the angle difference between the rollers and the displacement difference in the horizontal direction, and correspondingly adjust the pipe diameter and the wall thickness of the finished metal pipe. The invention carries out structural transformation on the steel ladle, the tundish and the flow distributor, and adds the wire feeding device and the restraint block, thereby realizing the production of the seamless fiber reinforced metal-based composite pipe.
Disclosure of Invention
The invention aims to provide a flexible forming device and a flexible forming method capable of producing seamless fiber reinforced metal matrix composite pipes with various specifications.
The invention particularly provides a flexible forming device for producing a seamless fiber reinforced metal-based composite pipe, which comprises a wire feeding rack, a tension pulley, a roller, a conveying roller, an arc guide plate, a steel ladle, a tundish, a flow diverter, a flow distributor and a restriction block, wherein the wire feeding rack is fixed on a rack of a casting and rolling machine, the roller and the conveying roller are respectively arranged on the wire feeding rack by virtue of mounting shafts, the tension pulley is arranged between the roller and the conveying roller, two ends of the tension pulley are respectively connected with the wire feeding rack by virtue of an elastic device,
the tundish is arranged below the conveying rollers, an arc-shaped guide plate is arranged between the tundish and the conveying rollers, the ladle is arranged above the tundish and positioned at one side of the arc-shaped guide plate, a hollow cylindrical conveying pipeline is arranged at the bottom of the ladle, the bottom of the hollow cylindrical conveying pipeline extends into the tundish, two through holes are arranged at the bottom of the tundish,
the two through holes are symmetrically arranged relative to the central line of the tundish, a boss is arranged in the tundish, the height of the boss is higher than that of the metal liquid level, the center of the boss is provided with a through hole with the same size as the restriction block, an upper slag baffle, a lower slag baffle, a stopper rod and a liquid level detection device are arranged in the tundish,
the lower part of the tundish is connected with a current distributor, the center of the current distributor is provided with a constraint block with the center of the tundish, the upper part of the current distributor is a rectangular shell, the lower part of the current distributor is provided with a wedge-shaped side surface, the wedge-shaped side surface is provided with a through hole convenient for metal liquid to distribute and flow onto the roller for rolling, the center of the inner wall of the current distributor is provided with a groove for installing the constraint block, the inside of the current distributor is symmetrically provided with two flow diverters, the two flow diverters are respectively connected with the two through holes at the bottom of the tundish, and the lower part of the current distributor is provided with two rollers.
Preferably, the front surface of the arc-shaped guide plate is an arc-shaped steel plate, the back surface of the arc-shaped guide plate is provided with a plurality of pipe materials, and the arc-shaped steel plate is connected with the pipe materials to form the arc-shaped guide plate.
Preferably, the surface of the conveying roller is provided with a circular groove, the back of the arc-shaped guide plate is provided with a channel, and the circular groove and the channel are concentrically arranged with a through hole of the restraint block in the boss of the tundish respectively.
Preferably, the present invention further provides a flexible forming method for producing a seamless fiber reinforced metal matrix composite tube, comprising the steps of:
s1, selecting proper metal base and reinforcing fibers according to production requirements, ensuring that the melting point of the reinforcing fibers is higher than that of the metal base, carrying out pre-rolling treatment on the reinforcing fibers, selecting proper constraint blocks and installing the constraint blocks, then installing a plurality of reinforcing fiber rolls on a roller, and enabling one end of each reinforcing fiber to bypass a tension wheel and be placed on a conveying roller;
s2, preheating the current distributor and the flow diverter, rotating the roller to enable the reinforcing fibers to pass through the conveying roller, vertically and downwards transmitting the reinforcing fibers along the through holes along the arc-shaped guide plate, enabling the reinforcing fibers to pass through the through holes in the restraint block, and stopping rotating until the end of the reinforcing fibers is 10-15 cm lower than the center of the roller;
s3, opening a cooling system in the casting and rolling mill roller, adjusting the flow rate of the cooling system, the distance between the two rollers and the central line and the included angle between the axes of the two rollers to meet the production requirement, adjusting the roller gap to the wall thickness of a product, driving the rollers, and adjusting the rolling speed of the two rollers to the speed required by the production requirement;
s4, adjusting the position of the pipe former to meet the production requirement;
s5, according to the metal material, introducing protective gas into the casting and rolling area, pouring molten metal into the steel ladle, allowing the molten metal in the steel ladle to flow into the tundish, adjusting the positions of the two stopper rods to make the flow rates of the two flow diverters reach the standard and equal, and allowing the molten metal to uniformly flow out of the flow distributor, so that the rolling process starts;
s6, the molten metal flows out from the flow distributor uniformly, the temperature around the flow distributor is reduced by the influence of the cooling system in the roller, the sheet is rolled and formed, because of the existence of the restriction block, the reinforced fiber is always at the neutral surface of the sheet, the rolled sheet moves forward spirally under the action of the pipe former, and is remelted metallurgically at the gap between the two rollers to form a closed loop, thereby generating the metal pipe with fiber reinforcement.
Preferably, the preheating temperature for preheating the flow distributor and the flow diverter in the step S2 is determined according to the melting point of the metal matrix.
Preferably, the preheating temperature for preheating the flow distributor and the flow diverter in the step S2 is 500-1100 ℃.
Compared with the prior art, the invention has the following effects:
1. the continuous fiber and metal liquid-solid mixed rolling is realized, the fiber and metal are combined more stably under the action of pressure and high temperature, the problem that the seamless fiber reinforced metal composite pipe cannot be continuously produced by the existing production methods such as a casting method, a spraying method and the like is solved, the energy and the material are saved, and the production efficiency is high;
2. the liquid metal and the reinforcing fiber are directly combined into the seamless fiber reinforced pipe, only one processing procedure is needed, the complexity of multiple procedures is avoided, and the parameters of the mechanism can be adjusted to generate the seamless fiber reinforced pipe with various calibers, wall thicknesses and reinforcing fiber helical angles;
3. the fibers are positioned by the constraint blocks, so that the fibers are molded on the neutral surface of the pipe, and the specification and quality of products are ensured. The device restraint block is replaced according to the type of the reinforcing fiber of the produced pipe, so that products with various specifications such as wire reinforcement, net material reinforcement, strip material reinforcement and the like can be produced.
Drawings
FIG. 1 is a perspective view of an apparatus of embodiment 1 of the present invention assembled with a roll;
FIG. 2 is a schematic cross-sectional view of an apparatus according to embodiment 1 of the present invention at the center plane of a reinforcing fiber;
FIG. 3 is a schematic top view of the assembly of a tundish and a restraint block according to embodiment 1 of the present invention;
FIG. 4 is a schematic top cross-sectional view of an assembly of a flow distributor and a constraining block according to embodiment 1 of the present invention;
FIG. 5 is a schematic top view of the assembly of a tundish and a restraint block according to embodiment 4 of the present invention;
FIG. 6 is a schematic cross-sectional view of a seamless pipe produced according to example 1 of the present invention;
FIG. 7 is a schematic cross-sectional view of a seamless tube produced in accordance with example 2 of the present invention;
FIG. 8 is a schematic cross-sectional view of a seamless tube produced in accordance with example 3 of the present invention; and
FIG. 9 is a schematic cross-sectional view of a seamless tube produced in accordance with example 4 of the present invention.
Some of the reference numbers in the figures are as follows:
1-wire feeding frame, 2-roller, 3-tension wheel, 4-conveying roller, 5-arc guide plate, 6-steel ladle, 7-tundish, 8-flow distributor, 9-hyperbolic roller, 10-core roller, 11-first flow diverter, 12-second flow diverter, 13-restraint block, 101-reinforced fiber, 102-metal base, 61-hollow cylindrical conveying pipeline and 71-boss.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The invention provides a flexible forming device for producing a seamless fiber reinforced metal matrix composite pipe, one embodiment of which is shown in figures 1 and 2: send a frame 1 to install in the casting and rolling machine frame, cylinder 2 installs on sending a frame 1's short arm, it installs on sending a frame 1's long arm to transport roller 4, it has take-up pulley 3 to provide the tensile force to the reinforced fiber in the rolling process to transport between cylinder 2 and the transport roller 4, take-up pulley 3 is coupled to by the spring and send a frame 1 on, should make its circular recess and the through-hole of restraint piece 13 in the 7 bosss of centre package concentric in transport roller 4 cooperation and the use, arc baffle 5 is connected in the central top department of centre package 7, ladle 6 is in centre package 7 one side top, and there is the pipeline of a cylinder type in the bottom surface in order to shift the molten metal to the centre package 7 in.
Specifically, in one embodiment, the wire feeder frame 1 includes two longitudinal supports, two first transverse supports disposed above the longitudinal supports, and two second transverse supports disposed below the longitudinal supports, the length of the first transverse supports being smaller than the length of the second transverse supports, the drum 2 is mounted between the two first transverse supports of the wire feeder frame 1 by means of a mounting shaft, and the transport roller 4 is mounted between the two second transverse supports of the wire feeder frame 1 by means of a mounting shaft. In other embodiments, the wire feeder frame 1 may be configured without limitation, and the drum 2 and the delivery roll 4 are mounted to the wire feeder frame 1 by mounting shafts, respectively.
A tension wheel 3 is arranged between the roller 2 and the conveying roller 4, and two ends of the tension wheel 3 are respectively connected with the wire feeding rack 1 by an elastic device.
The elastic device comprises a spring and a V-shaped support, one end of the spring is fixed on the wire feeding rack 1, one end of the V-shaped support is connected with the rotating shaft of the tension wheel 3, and the other end of the spring is connected with the other end of the V-shaped support. In other embodiments, the elastic device may also take other structures as long as elasticity is achieved.
The two through holes are symmetrically arranged relative to the central line of the tundish 7, the boss 71 is arranged inside the tundish 7, the height of the boss 71 is higher than that of the metal liquid level, the through hole with the same size as the restraint block 13 is formed in the center of the boss, and an upper slag baffle, a lower slag baffle, a stopper rod and a liquid level detection device are arranged in the tundish 7.
The lower part of the tundish 7 is connected with a flow distributor, and the centers of the flow distributor 8 and the tundish 7 are provided with a restraint block 13.
The upper portion of the current distributor 8 is a rectangular shell, the lower portion of the current distributor 8 is provided with a wedge-shaped side face, a through hole convenient for metal liquid to distribute and flow onto the roller for rolling is formed in the wedge-shaped side face, a groove used for installing a constraint block 13 is formed in the center of the inner wall of the current distributor 8, two drainage devices are symmetrically arranged inside the current distributor 8, and the two drainage devices are a first drainage device 11 and a second drainage device 12. Two drainage devices are respectively connected with two through holes at the bottom of the tundish 7, and two rollers are arranged below the flow distributor 8.
Preferably, the exterior of the flow distributor 8 is provided with a cooling system.
Preferably, the two rolls comprise a hyperbolic roll 9 and a core roll 10.
Fig. 2 is a cross-sectional view of the apparatus of the embodiment of fig. 1 at the center plane of the reinforcing fibers, showing the reinforcing fibers 101 positioned in fluid communication with the metal matrix 102. Fig. 3 is a top view of the assembly of the tundish 7 and the constraining block 13 in embodiment 1 of fig. 1, and particularly shows the structure of the tundish 7 in conjunction with fig. 2, and also shows the positions of the reinforcing fibers 101 in communication with the metal matrix 102. Fig. 4 shows a schematic sectional view of the assembly of the inner wall groove of the flow distributor 8 and the restraint block 13.
The invention also provides a flexible forming method for producing the seamless fiber reinforced metal-based composite pipe, which comprises the following steps:
s1, selecting proper metal base 102 and reinforcing fibers 101 according to production requirements, ensuring that the melting point of the reinforcing fibers 101 is higher than that of the metal base 102, carrying out pre-rolling treatment on the reinforcing fibers 101, selecting proper restraining blocks 13, installing the restraining blocks 13, then winding and installing a plurality of reinforcing fibers 101 on a roller 2, and enabling one end of each reinforcing fiber 101 to pass by a tension wheel 3 and be placed on a conveying roller 4;
s2, preheating the current distributor 8, the first flow diverter 11 and the second flow diverter 12, rotating the roller 2 to enable the reinforcing fibers 101 to pass through the conveying roller 4 and vertically and downwards transmit the reinforcing fibers along the through holes along the arc-shaped guide plate 5, enabling the reinforcing fibers 101 to pass through the through holes in the restraining blocks 13, and stopping rotating until the end of the reinforcing fibers 101 is 10-15 cm lower than the center of the roller;
s3, opening a cooling system in the casting and rolling mill roller, adjusting the flow rate of the cooling system and the included angle between the axes of the two rollers to meet the production requirement, adjusting the roller gap to the wall thickness of a product, driving the rollers, and adjusting the rolling speed of the two rollers to the speed required by the production requirement;
s4, adjusting the position of the pipe former to meet the production requirement;
s5, according to metal materials, introducing protective gas into a casting and rolling area, pouring the metal base 102 into a steel ladle 6, enabling the metal base 102 in the steel ladle 6 to flow into a tundish 7, adjusting the positions of two stopper rods to enable the flow rates of the first flow diverter 11 and the second flow diverter 12 to reach the standard and be equal, and starting the rolling process when the metal base 102 uniformly flows out of the flow distributor 8;
s6, the molten metal flows out from the flow distributor 8 uniformly, the temperature around the roller is reduced by the influence of a cooling system, the reinforced fiber 101 is always at the neutral surface of the plate due to the existence of the restriction block 13, the rolled plate moves forward spirally under the action of the pipe former and is remelted metallurgically at the gap between the two rollers to form a closed loop, and thus the metal pipe with fiber reinforcement is produced.
This production method allows the production of a wide variety of seamless fiber reinforced metal matrix composite pipes, exemplified below:
specific example 1:
the metal base is 6061 aluminum alloy, the reinforced fiber is steel wire, the diameter of the steel wire is phi 1.5 mm-phi 2.5mm, the wall thickness of the product is 5 mm-10 mm, and the outer diameter is 80 mm-150 mm. The aluminum alloy and the steel have larger melting point difference, can form metallurgical bonding in the rolling process, are more tightly bonded, have good process performance and have larger specific rigidity and specific strength. Fig. 6 is a schematic cross-sectional view of a product, in which the reinforcing fibers 101 are steel wires, the metal matrix 102 is 6061 aluminum alloy, and the strength of the pipe can be greatly enhanced by using three fibers due to the small diameter of the selected steel wires, so that the pipe can be enhanced as much as possible in a limited space.
S1, before rolling, pickling the steel wire, removing impurities such as surface oxides, selecting three holes and a restraint block 13 with the aperture slightly larger than that of the steel wire, installing the restraint block 13, then installing three steel wire coils on the roller 2, and enabling one end of the steel wire to bypass the tension wheel 3 and be placed on the conveying roller 4;
s2, preheating the current distributor 8, the first flow diverter 11 and the second flow diverter 12 to 600 ℃, rotating the roller 2 to enable the steel wire to pass through the transfer roll 4, vertically and downwards transmitting the steel wire along the through hole along the arc-shaped guide plate 5, enabling the steel wire to pass through the through hole in the restriction block 13, and stopping rotating until the end of the steel wire is 10-15 cm lower than the center of the roller;
s3, opening a cooling system in the casting and rolling mill roller, adjusting the flow rate of the cooling system and the distance between the two rollers and the central line to meet the production requirement, adjusting the roller gap to 5-10 mm, driving the rollers, and adjusting the rolling speed of the two rollers to 2 m/min;
s4, adjusting the position of the pipe former to meet the production requirement;
s5, introducing argon as protective gas into the casting and rolling area, pouring aluminum alloy liquid into the steel ladle 6, enabling the aluminum alloy liquid in the steel ladle 6 to flow into the tundish 7, adjusting the positions of the two stopper rods to enable the flow rates of the first flow diverter 11 and the second flow diverter 12 to reach the standard and be equal, enabling the aluminum alloy liquid to uniformly flow out of the flow distributor 8, and starting the rolling process;
s6, the aluminum alloy liquid flows out from the current distributor 8 uniformly, the temperature around the roller is reduced by the influence of a cooling system, the steel wire is always at the neutral surface of the plate due to the existence of the restriction block 13, the rolled plate moves forward spirally under the action of the pipe former and is remelted metallurgically at the gap between the two rollers to form a closed loop, and therefore the aluminum alloy pipe with the reinforced steel wire is produced.
Specific example 2:
the metal base is copper, the reinforcing fiber is graphite fiber, the diameter of the graphite fiber is phi 1 mm-phi 3mm, the wall thickness of the product is 5 mm-10 mm, and the outer diameter is 80 mm-160 mm. The graphite fiber has the characteristics of high melting point, good conductivity and high toughness, is spirally wound in the seamless copper pipe, reduces the weight of the copper pipe, keeps the conductivity of the copper pipe, and is applied to occasions needing light weight and good conductivity. As shown in fig. 7, which is a cross-sectional view of the product, the reinforcing fibers 101 are graphite fibers, and the metal matrix 102 is copper.
S1, before rolling, removing glue from the graphite fiber at a high temperature of 560 ℃ for 30min, selecting a restraint block 13 with a single hole and a slightly larger aperture than the graphite fiber, installing the restraint block 13, then installing a graphite fiber roll on the roller 2, and placing one end of the graphite fiber on the conveying roller 4 by bypassing the tension wheel 3;
s2, preheating the current distributor 8, the first flow diverter 11 and the second flow diverter 12 to 900 ℃, rotating the roller 2 to enable the graphite fibers to pass through the conveying roller 4 and vertically and downwards transmit along the through holes along the arc-shaped guide plate 5, and enabling the graphite fibers to pass through the through holes in the restraining blocks 13 until the end heads of the graphite fibers are 10-15 cm lower than the center of the roller, and stopping rotating;
s3, opening a cooling system in the casting and rolling mill roller, adjusting the flow rate of the cooling system and the distance between the two rollers and the central line to meet the production requirement, adjusting the roller gap to 5-10 mm, driving the rollers, and adjusting the rolling speed of the two rollers to 2 m/min;
s4, adjusting the position of the pipe former to meet the production requirement;
s5, introducing argon gas as protective gas into the casting and rolling area, pouring the copper liquid into the steel ladle 6, enabling the copper liquid in the steel ladle 6 to flow into the tundish 7, adjusting the positions of the two stopper rods to enable the flow rates of the first flow diverter 11 and the second flow diverter 12 to reach the standard and be equal, and starting the rolling process when the copper liquid uniformly flows out of the flow distributor 8;
s6, the copper liquid flows out from the flow distributor 8 uniformly, the temperature around the roller is reduced by the influence of a cooling system, the graphite fiber is always at the neutral surface of the plate due to the existence of the restriction block 13, the rolled plate moves forward spirally under the action of the pipe former and is remelted metallurgically at the gap between the two rollers to form a closed loop, and thus, the copper pipe reinforced by the graphite fiber is produced.
Specific example 3:
the metal base 102 is 6061 aluminum alloy, the reinforced fiber 101 is silicon carbide fiber, the diameter of the silicon carbide fiber is phi 2 mm-5 mm, the wall thickness of the product is 6 mm-15 mm, and the outer diameter is 80 mm-150 mm. The silicon carbide fiber has high axial tensile strength, and the torsional strength of the pipe can be greatly enhanced due to spiral winding. As shown in fig. 8, the reinforcing fibers 101 are silicon carbide fibers, the metal matrix 102 is 6061 aluminum alloy, the helix angle in the production process is reduced as much as possible, and the axial direction of the fibers is overlapped with the circumferential direction of the pipe as much as possible, so that when the pipe is subjected to the torsional force T1, the component force F1y of the fiber force F1 in the axial direction of the fibers and the axial direction of F1y is offset with the torsional force, and since the helix angle is very small, F1x is particularly small, and F1y is almost the same as F1 in size, the advantage of high axial tensile strength is better utilized, and the torsional strength of the pipe is increased.
S1, selecting two holes and a restraining block 13 with the aperture slightly larger than that of the silicon carbide fiber, installing the restraining block 13, then installing a silicon carbide fiber roll on the roller 2, and enabling one end of the silicon carbide fiber to bypass the tension wheel 3 and be placed on the conveying roller 4;
s2, preheating the flow distributor 8, the first flow diverter 11 and the second flow diverter 12 to 600 ℃, rotating the roller 2 to enable the silicon carbide fiber to pass through the transfer roll 4 and vertically and downwards transmit along the through hole along the arc-shaped guide plate 5, so that the silicon carbide fiber passes through the through hole in the restriction block 13, and stopping rotating until the end of the silicon carbide fiber is 10-15 cm lower than the center of the roller;
s3, opening a cooling system in the casting and rolling mill roller, adjusting the flow rate of the cooling system to meet the production requirement, adjusting the included angle of the axes of the two rollers to be as small as possible to meet the production requirement, adjusting the roller gap to 6-15 mm, driving the rollers, and adjusting the rolling speed of the two rollers to 2 m/min;
s4, adjusting the position of the pipe former to meet the production requirement;
s5, introducing argon as protective gas into the casting and rolling area, pouring aluminum alloy liquid into the steel ladle 6, enabling the aluminum alloy liquid in the steel ladle 6 to flow into the tundish 7, adjusting the positions of the two stopper rods to enable the flow rates of the first flow diverter 11 and the second flow diverter 12 to reach the standard and be equal, enabling the aluminum alloy liquid to uniformly flow out of the flow distributor 8, and starting the rolling process;
s6, aluminum alloy liquid uniformly flows out from the flow distributor 8, the temperature around the roller is reduced under the influence of a cooling system, rolling forming is carried out, silicon carbide fiber is always at the neutral surface of the plate due to the existence of the constraint block 13, the rolled plate moves forwards in a spiral mode under the action of the pipe former and is remelted in a metallurgical mode at the gap of the two rollers, a closed loop is formed, and therefore the aluminum alloy pipe with the silicon carbide fiber reinforcement is formed.
Specific example 4:
by changing the restriction block 13 of example 1 in fig. 3 to the rectangular through-hole structure shown in fig. 4, a pipe with mesh-like reinforcing fibers or band-like reinforcing fibers can be produced.
The following is an example of producing a pipe having a tape-shaped reinforcing fiber:
the metal matrix is made of heat-resistant steel, the reinforcing fiber is a ribbon-shaped alumina refractory fiber with the thickness of 5-7 mm, the width of 30-40 mm, the wall thickness of a finished product is 15-25 mm, and the outer diameter is 150-250 mm. The alumina refractory fiber has very low thermal conductivity and thermal insulation performance, and is seamlessly spirally wound in a seamless heat-resistant steel pipe, so that the high-pressure resistance, high-temperature resistance and thermal insulation performance of a finished pipe are ensured. Fig. 9 shows a cross-sectional view of the final product, in which the reinforcing fibers 101 are ribbon-shaped alumina refractory fibers and the metal matrix 102 is steel, and shows that the pitch and the width of the fibers are the same, so that the fibers are spirally closed inside the tube, and the heat insulation effect is achieved.
S1, selecting a square hole restraining block 13 with the width and length slightly larger than the size of the alumina refractory fiber, installing the restraining block 13, then installing an alumina refractory fiber roll on the roller 2, and placing one end of the alumina refractory fiber on the conveying roller 4 by bypassing the tension wheel 3;
s2, preheating the flow distributor 8, the first flow diverter 11 and the second flow diverter 12 to 1100 ℃, rotating the roller 2 to enable the alumina refractory fiber to pass through the transfer roll 4 and vertically and downwards transmit along the through hole along the arc-shaped guide plate 5, enabling the alumina refractory fiber to pass through the through hole in the restraint block 13, and stopping rotating until the end of the alumina refractory fiber is 10-15 cm lower than the center of the roller;
s3, opening a cooling system in the casting and rolling mill roller, adjusting the flow rate of the cooling system to meet the production requirement, adjusting the included angle between the axes of the two rollers to meet the requirement that the screw pitch of the spiral motion is equal to the bandwidth of the ribbon fiber in the production process, adjusting the roller gap to 15-25 mm, driving the rollers, and adjusting the rolling speed of the two rollers to 2 m/min;
s4, adjusting the position of the pipe former to meet the production requirement;
s5, introducing argon as a protective gas into the casting and rolling area, pouring molten steel into the steel ladle 6, making the molten steel in the steel ladle 6 flow into the tundish 7, adjusting the positions of the two stopper rods to ensure that the flow rates of the first flow diverter 11 and the second flow diverter 12 reach the standard and are equal, and starting the rolling process when the molten steel uniformly flows out of the flow distributor 8;
s6, the molten steel uniformly flows out from the flow distributor 8, the temperature around the roller is reduced by the influence of the cooling system, the aluminum oxide refractory fiber is always on the neutral surface of the plate due to the existence of the restriction block 13, the rolled plate moves forward spirally under the action of the pipe former and is remelted metallurgically at the gap between the two rollers to form a closed loop, and thereby the heat-resistant steel pipe reinforced by the aluminum oxide refractory fiber is produced.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.
Claims (7)
1. The utility model provides a flexible forming device of production seamless fibre reinforcement metal matrix composite pipe which characterized in that: the device comprises a wire feeding rack, a tension wheel, a roller, a conveying roller, an arc guide plate, a steel ladle, a tundish, a flow diverter, a flow distributor and a restriction block, wherein the wire feeding rack is fixed on a rack of a casting and rolling machine, the roller and the conveying roller are respectively arranged on the wire feeding rack by means of mounting shafts, the tension wheel is arranged between the roller and the conveying roller, two ends of the tension wheel are respectively connected with the wire feeding rack by means of an elastic device,
the tundish is arranged below the conveying rollers, an arc-shaped guide plate is arranged between the tundish and the conveying rollers, the ladle is arranged above the tundish and positioned at one side of the arc-shaped guide plate, a hollow cylindrical conveying pipeline is arranged at the bottom of the ladle, the bottom of the hollow cylindrical conveying pipeline extends into the tundish, two through holes are arranged at the bottom of the tundish,
the two through holes are symmetrically arranged relative to the central line of the tundish, a boss is arranged in the tundish, the height of the boss is higher than that of the metal liquid level, the center of the boss is provided with a through hole with the same size as the restriction block, an upper slag baffle, a lower slag baffle, a stopper rod and a liquid level detection device are arranged in the tundish,
the lower part of the tundish is connected with a current distributor, the center of the current distributor is provided with a constraint block with the center of the tundish, the upper part of the current distributor is a rectangular shell, the lower part of the current distributor is provided with a wedge-shaped side surface, the wedge-shaped side surface is provided with a through hole convenient for metal liquid to distribute and flow onto the roller for rolling, the center of the inner wall of the current distributor is provided with a groove for installing the constraint block, the inside of the current distributor is symmetrically provided with two flow diverters, the two flow diverters are respectively connected with the two through holes at the bottom of the tundish, and the lower part of the current distributor is provided with two rollers.
2. The flexible forming apparatus for producing a seamless fiber reinforced metal matrix composite tube according to claim 1, wherein: the front surface of the arc-shaped guide plate is provided with an arc-shaped steel plate, the back surface of the arc-shaped guide plate is provided with a plurality of pipes, and the arc-shaped steel plate is connected with the pipes to form the arc-shaped guide plate.
3. The flexible forming apparatus for producing a seamless fiber reinforced metal matrix composite tube according to claim 1, wherein: and a cooling system is arranged in the roller.
4. The flexible forming apparatus for producing a seamless fiber reinforced metal matrix composite tube according to claim 1, wherein: the surface of the conveying roller is provided with a circular groove, the back of the arc-shaped guide plate is provided with a channel, and the circular groove and the channel are concentrically arranged with a through hole of the constraint block in the boss of the tundish respectively.
5. A flexible forming method based on the flexible forming device for producing a seamless fiber reinforced metal matrix composite pipe of claim 1, wherein: the method comprises the following steps:
s1, selecting proper metal base and reinforcing fibers according to production requirements, ensuring that the melting point of the reinforcing fibers is higher than that of the metal base, carrying out pre-rolling treatment on the reinforcing fibers, selecting proper constraint blocks and installing the constraint blocks, then installing a plurality of reinforcing fiber rolls on a roller, and enabling one end of each reinforcing fiber to bypass a tension wheel and be placed on a conveying roller;
s2, preheating the current distributor and the flow diverter, rotating the roller to enable the reinforcing fibers to pass through the conveying roller, vertically and downwards transmitting the reinforcing fibers along the through holes along the arc-shaped guide plate, enabling the reinforcing fibers to pass through the through holes in the restraint block, and stopping rotating until the end of the reinforcing fibers is 10-15 cm lower than the center of the roller;
s3, opening a cooling system in the casting and rolling mill roller, adjusting the flow rate of the cooling system, the distance between the two rollers and the central line and the angle between the two roller axes to meet the production requirement, driving the rollers, and adjusting the rolling speed of the two rollers to the speed required by the production requirement;
s4, adjusting the position of the pipe former to meet the production requirement;
s5, according to the metal material, introducing protective gas into the casting and rolling area, pouring molten metal into the steel ladle, allowing the molten metal in the steel ladle to flow into the tundish, adjusting the positions of the two stopper rods to make the flow rates of the two flow diverters reach the standard and equal, and allowing the molten metal to uniformly flow out of the flow distributor, so that the rolling process starts;
s6, the molten metal flows out from the flow distributor uniformly, the temperature around the flow distributor is reduced by the influence of the cooling system in the roller, the sheet is rolled and formed, because of the existence of the restriction block, the reinforced fiber is always at the neutral surface of the sheet, the rolled sheet moves forward spirally under the action of the pipe former, and is remelted metallurgically at the gap between the two rollers to form a closed loop, thereby generating the metal pipe with fiber reinforcement.
6. The flexible molding method according to claim 5, wherein: the preheating temperature for preheating the flow distributor and the flow diverter in the step S2 is determined according to the melting point of the metal matrix.
7. The flexible molding method according to claim 6, wherein: the preheating temperature for preheating the current distributor and the flow diverter in the step S2 is 500-1100 ℃.
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| CN115106494A (en) * | 2022-05-27 | 2022-09-27 | 燕山大学 | Flexible forming device and method for spiral groove pipe |
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